Power Control of the Level 1 Calorimeter Trigger -------------------------------------------------- Original Rev. 27-JUNE-2001 Current Rev. 06-Oct-2005 The most recent version of these instructions can be found at: http://www.pa.msu.edu/hep/d0/ftp/l1/cal_trig/hardware/rack_crate/ cal_trig_power_control_procedures.txt This procedure describes all of the steps that are necessary to turn off and to power up the Level 1 Calorimeter Trigger racks. These racks are located in the 1st floor MCH and are labeled M101 through M113. To turn OFF all of the L1 Calorimeter Trigger: If there is an emergency (e.g. a fire) then press the RED button (for an emergency shutdown) on the Rack Power Safety System (RPSS) control box on the front of either rack M102 or M113. For normal power down of the L1 Calorimeter Trigger racks take the following two steps: 1. Turn OFF the breakers on all L1 Cal Trig Power Supplies. The L1 Cal Trig Power Supplies are the green panels located in racks M103 through M112. There are 2 power supplies in racks M103, M105, M107, M109, and M111. There are 3 power supplies in racks M104, M106, M107, M110, and M112. 2. Press the YELLOW button (for a normal shutdown) on the RPSS control box on the front of either rack M102 or M113. The power contactors will open as soon as you press the yellow button and 10 seconds later the fan will stop. If you are going to work inside one of the Calorimeter Trigger racks please take one of the keys from an RPSS control box so that power will not be applied to the Calorimeter Trigger while you are working on it. To turn the L1 Calorimeter Trigger back ON: 1. Keys must be installed in the two Calorimeter Trigger RPSS control boxes. One of these is on the front of rack M102 and the other is on the front of rack M113. 2. Verify that the L1 Cal Trig Power Supplies are turned OFF as described in step 1 of the shutdown procedure above. 3. On the Photo-Helic differential pressure gauge, located at the front of rack M113, set the LOW LIMIT set point to 0.40 inches. The LOW LIMIT set point is controlled by the knob on the LEFT side of this gauge and and the value of the LOW LIMIT set point is indicated by the left hand red needle. 4. Press the "Fault Reset" button on the RPSS Panel the Rack Power Safety System Panel at the very bottom of rack M113. 5. Press the Green Start button on either of the Calorimeter Trigger RPSS control boxes. The fan will start up immediately and 10 seconds later the power contactors will close letting AC power into the racks. 6. Watch the black differential pressure indicator needle on the Photo-Helic at the front of rack M113. After about 30 seconds this black indicator needle should show a differential pressure of between 1.65 and 1.75 inches. After the differential pressure reaches this level, adjust the LOW LIMIT control knob (the left hand control knob which moves the left hand red needle) so that the LOW LIMIT set point is 1.30 inches. 7. Then turn on the individual Cal Trig power supplies. These power supplies are the green panels located in M103 through M112. Do not open more than one door at a time while turning on these power supplies. M103: Middle and Bottom power supplies These feed the two Tier 1 crates in M103 for Eta +1:+4. M104: Top power supply. This feeds the Calorimeter Trigger Control Crate the top crate in M103. Middle and Bottom power supplies These feed the two Tier 1 crates in M104 for Eta -1:-4. M105: Middle and Bottom power supplies These feed the two Tier 1 crates in M105 for Eta +5:+8. M106: Top power supply. This feeds the Tier 2 Crate in the top of M105 for |Eta| = 1:8. Middle and Bottom power supplies These feed the two Tier 1 crates in M106 for Eta -5:-8. M107: Middle and Bottom power supplies These feed the two Tier 1 crates in M107 for Eta +9:+12. M108: Top power supply. This feeds the Tier 3 Crate in the top of M107. Middle and Bottom power supplies These feed the two Tier 1 crates in M108 for Eta -9:-12. M109: Middle and Bottom power supplies These feed the two Tier 1 crates in M109 for Eta +13:+16. M110: Top power supply. This feeds the Tier 2 Crate in the top of M109 for |Eta| = 9:16. Middle and Bottom power supplies These feed the two Tier 1 crates in M110 for Eta -13:-16. M111: Middle and Bottom power supplies These feed the two Tier 1 crates in M109 for Eta +17:+20. M112: Top power supply. This feeds the Tier 2 Crate in the top of M111 for |Eta| = 17:20. Middle and Bottom power supplies These feed the two Tier 1 crates in M110 for Eta -17:-20. The 25 power supplies that should be turned on all have labels on them that say what crate a given supply provides power to. All of these power supplies, except for the one in the top of rack M103, have 4 red LED's that should come on. The power supply in the top of rack M103 has only 2 red LED's. Make absolutely certain that the front rack doors are properly closed back up so that full cooling air circulation will take place in the L1 Calorimeter Trigger. Verify that the doors on the back the racks are closed. The RPSS Panel at the very bottom of rack M113 will show illuminated LED's for both the Fan and the Rack Power. Once all the power supplies are operating, the full procedure for "cold starting" the L1 Cal Trig is covered in: www.pa.msu.edu/hep/d0/ftp/l1/cal_trig/hardware/rack_crate/ l1_cal_trig_cold_start.txt That file covers things like: the software initialization of the Cal Trig, setting the eta coverage, and loading Gain and Pedestal files. One of the things that could prevent the RPSS from allowing power to the L1 Cal Trig is if a drip detector is detecting a water leak. The display from the drip detector can be seen at the top of rack M110. Currently a normal display for this panel is: Red 100-101 Red 101-102 Green 102-103 Green 103-104 Green 104-105 Green 105-106 Green 106-107 Green 107-108 Green 108-109 Green 109-110 Green 110-111 Green 111-112 Green 112-113 Red 114 Red Spare Red Spare The RMI box used for drip detection is plugged into the M114 slot of the RPSS. If the RMI detects a water leak the RPSS will trip showing "Air Flow" and "Water Pressure" faults in M114. If the Calorimeter Trigger has been off for many hours then the air in its racks can become quite cold. When this air reaches the VESDA in rack M113 it can sometimes falsely cause the VESDA to think that it has an excessive air flow trouble condition. This VESDA over air flow trouble condition is reported on the FIRUS system. If the Cal Trig has been off for a long time, before turning it on, it is best to call the D-Zero On Duty Operator x2849 and Dispatch x3414 and let them know that they maybe receiving these FIRUS trouble condition indication from the D-Zero Trigger Racks VESDA. If there are any problems or questions please contact either Dan Edmunds or Philippe Laurens at MSU at 517-355-9200 x2521 or x2522 or Bob Kehoe at Fermi.